/Engine/Source/Runtime/InteractiveToolsFramework/Public/BaseTools/SingleClickTool.h
The function ::OnClicked() implements the action that will occur when a click happens. You must override this to implement any kind of useful behavior.
class USingleClickTool : public [UInteractiveTool](API\Runtime\InteractiveToolsFramework\UInteractiveTool), public [IClickBehaviorTarget](API\Runtime\InteractiveToolsFramework\BaseBehaviors\IClickBehaviorTarget)